agent: Fix npth + daemon mode problem.

* agent/gpg-agent.c (main): Remove duplicated initialization in daemon
mode.

The commit f57dc2b1e6f28d164f882373535dbcb0d632ca17 fixes a part of
problem (for missing initialization of supervised mode). It was
actually put in wrong place.

• Fixes-commit: 9f92b62a51d2d60f038fdbe01602865c5933fa95
• Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>